Extract Email Analytics via REST API

Hi,

Has anyone here extracted email analytics on records via the REST API. I've seen some talks around the community on this, but nothing concrete. What we are trying to do is get sent open clicks by user on all emails and push that to our data warehouse storage.

Possibly done through the getLeadChanges, but i'm unsure on the level of output i'll get when I apply the filters of send open clicks.

Any other thoughts ideas??